Light-induced anisotropy in azo-dye-colored materials

Molecular Aggregations and Induction of Anisotropy by Light in Azodyes

“…Thus, when we imagine a film with photoinducted anisotropy as a monocrystal, it is considered that the abovementioned transparency modulation takes place based on the modulation of birefringence value of the film. However, besides, in our opinion, image formation in film during the anisotropy photoinduction can be carried out in the other way, in particular, anisotropy can be induced by "grain" distribution and their concentration would be modulated by light exposition [2].…”

Azobenzene Polymers for Photonic Applications

“…On irradiation, one can induce a phase change (Aoki et al, 2000), a solubility change (Arai and Kawabata, 1995;Yamamoto et al, 1990), crystallization (Ebralidze and Mumladze, 1990), or even reversal of phase separation (Effing and Kwak, 1995). The critical micelle concentration (cmc) and surface activity can also be modified (Yang et al, 1995).…”

Anisotropy Photoinduction during the Mass Associations of Dye Molecules in Gelatin Films

“…However, to obtain high effect during the anisotropy photoinduction, the concentration of dyes in the film must be as high as possible. As for the increased concentration of dye in the solutions, it leads to the formation of molecule associations in a solid state playing an important role in the photo-induced effects [3][4][5][6][7].…”

“…Based on the study of the dependence of the spectral transmission in the crossed polarizers of the gelatin film dyed with Chrysophenine with photo-induced anisotropy on the active light exposition [3], an opinion about the possible anisotropy photoinduction in organic compounds in the form of grains and increase of concentration of grains and their areas particularly depending on the light exposition in the film was expressed.…”